using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
/*
* HardwareHelperLib
* ===========================================================
* Windows XP SP2, VS2005 C#.NET, DotNet 2.0
* HH Lib is a hardware helper for library for C#.
* It can be used for notifications of hardware add/remove
* events, retrieving a list of hardware currently connected,
* and enabling or disabling devices.
* ===========================================================
* LOG: Who? When? What?
* (v)1.0.0 WJF 11/26/07 Original Implementation
*/
namespace HardwareHelperLib
{
#region Unmanaged
public class Native
{
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr RegisterDeviceNotification(IntPtr hRecipient, DEV_BROADCAST_DEVICEINTERFACE NotificationFilter, UInt32 Flags);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern uint UnregisterDeviceNotification(IntPtr hHandle);
[DllImport("setupapi.dll", SetLastError = true)]
public static extern IntPtr SetupDiGetClassDevs(ref Guid gClass, UInt32 iEnumerator, IntPtr hParent, UInt32 nFlags);
[DllImport("setupapi.dll", SetLastError = true)]
public static extern int SetupDiDestroyDeviceInfoList(IntPtr lpInfoSet);
[DllImport("setupapi.dll", SetLastError = true)]
public static extern bool SetupDiEnumDeviceInfo(IntPtr lpInfoSet, UInt32 dwIndex, SP_DEVINFO_DATA devInfoData);
[DllImport("setupapi.dll", SetLastError = true)]
public static extern bool SetupDiGetDeviceRegistryProperty(IntPtr lpInfoSet, SP_DEVINFO_DATA DeviceInfoData, UInt32 Property, UInt32 PropertyRegDataType, StringBuilder PropertyBuffer, UInt32 PropertyBufferSize, IntPtr RequiredSize);
[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern bool SetupDiSetClassInstallParams(IntPtr DeviceInfoSet, IntPtr DeviceInfoData, IntPtr ClassInstallParams, int ClassInstallParamsSize);
[DllImport("setupapi.dll", CharSet = CharSet.Auto)]
public static extern Boolean SetupDiCallClassInstaller(UInt32 InstallFunction,IntPtr DeviceInfoSet, IntPtr DeviceInfoData);
// Structure with information for RegisterDeviceNotification.
[StructLayout(LayoutKind.Sequential)]
public struct DEV_BROADCAST_HANDLE
{
public int dbch_size;
public int dbch_devicetype;
public int dbch_reserved;
public IntPtr dbch_handle;
public IntPtr dbch_hdevnotify;
public Guid dbch_eventguid;
public long dbch_nameoffset;
public byte dbch_data;
public byte dbch_data1;
}
// Struct for parameters of the WM_DEVICECHANGE message
[StructLayout(LayoutKind.Sequential)]
public class DEV_BROADCAST_DEVICEINTERFACE
{
public int dbcc_size;
public int dbcc_devicetype;
public int dbcc_reserved;
}
//SP_DEVINFO_DATA
[StructLayout(LayoutKind.Sequential)]
public class SP_DEVINFO_DATA
{
public int cbSize;
public Guid classGuid;
public int devInst;
public ulong reserved;
};
[StructLayout(LayoutKind.Sequential)]
public class SP_DEVINSTALL_PARAMS
{
public int cbSize;
public int Flags;
public int FlagsEx;
public IntPtr hwndParent;
public IntPtr InstallMsgHandler;
public IntPtr InstallMsgHandlerContext;
public IntPtr FileQueue;
public IntPtr ClassInstallReserved;
public int Reserved;
[MarshalAs(UnmanagedType.LPTStr)] public string DriverPath;
};
[StructLayout(LayoutKind.Sequential)]
public class SP_PROPCHANGE_PARAMS
{
public SP_CLASSINSTALL_HEADER ClassInstallHeader=new SP_CLASSINSTALL_HEADER();
public int StateChange;
public int Scope;
public int HwProfile;
};
[StructLayout(LayoutKind.Sequential)]
public class SP_CLASSINSTALL_HEADER
{
public int cbSize;
public int InstallFunction;
};
//PARMS
public const int DIGCF_ALLCLASSES = (0x00000004);
public const int DIGCF_PRESENT = (0x00000002);
public const int INVALID_HANDLE_VALUE = -1;
public const int SPDRP_DEVICEDESC = (0x00000000);
public const int MAX_DEV_LEN = 1000;
public const int DEVICE_NOTIFY_WINDOW_HANDLE = (0x00000000);
public const int DEVICE_NOTIFY_SERVICE_HANDLE = (0x00000001);
public const int DEVICE_NOTIFY_ALL_INTERFACE_CLASSES = (0x00000004);
public const int DBT_DEVTYP_DEVICEINTERFACE = (0x00000005);
public const int DBT_DEVNODES_CHANGED = (0x0007);
public const int WM_DEVICECHANGE = (0x0219);
public const int DIF_PROPERTYCHANGE = (0x00000012);
public const int DICS_FLAG_GLOBAL = (0x00000001);
public const int DICS_FLAG_CONFIGSPECIFIC = (0x00000002);
public const int DICS_ENABLE = (0x00000001);
public const int DICS_DISABLE = (0x00000002);
}
#endregion
public class HH_Lib
{
Version m_Version = new Version(1, 0, 0);
#region Public Methods
//Name: GetAll
//Inputs: none
//Outputs: string array
//Errors: This method may throw the following errors.
// Failed to enumerate device tree!
// Invalid handle!
//Remarks: This is code I cobbled together from a number of newsgroup threads
// as well as some C++ stuff I translated off of MSDN. Seems to work.
// The idea is to come up with a list of devices, same as the device
// manager does. Currently it uses the actual "system" names for the
// hardware. It is also possible to use hardware IDs. See the docs
// for SetupDiGetDeviceRegistryProperty in the MS SDK for more details.
public string[] GetAll()
{
List<string> HWList = new List<string>();
try
{
Guid myGUID = System.Guid.Empty;
IntPtr hDevInfo = Native.SetupDiGetClassDevs(ref myGUID, 0, IntPtr.Zero, Native.DIGCF_ALLCLASSES | Native.DIGCF_PRESENT);
if (hDevInfo.ToInt32() == Native.INVALID_HANDLE_VALUE)
{
throw new Exception("Invalid Handle");
}
Native.SP_DEVINFO_DATA DeviceInfoData;
DeviceInfoData = new Native.SP_DEVINFO_DATA();
DeviceInfoData.cbSize = 28;
//is devices exist for class
DeviceInfoData.devInst = 0;
DeviceInfoData.classGuid = System.Guid.Empty;
DeviceInfoData.reserved = 0;
UInt32 i;
StringBuilder DeviceName = new StringBuilder("");
DeviceName.Capacity = Native.MAX_DEV_LEN;
for (i = 0; Native.SetupDiEnumDeviceInfo(hDevInfo, i, DeviceInfoData); i++)
{
//Declare vars
while (!Native.SetupDiGetDeviceRegistryProperty(hDevInfo,
DeviceInfoData,
Native.SPDRP_DEVICEDESC,
0,
DeviceName,
Native.MAX_DEV_LEN,
IntPtr.Zero))
{
//Skip
}
HWList.Add(DeviceName.ToString());
}
Native.SetupDiDestroyDeviceInfoList(hDevInfo);
}
catch (Exception ex)
{
throw new Exception("Failed to enumerate device tree!",ex);
}
return HWList.ToArray();
}
//Name: SetDeviceState
//Inputs: string[],bool
//Outputs: bool
//Errors: This method may throw the following exceptions.
// Failed to enumerate device tree!
//Remarks: This is nearly identical to the method above except it
// tries to match the hardware description against the criteria
// passed in. If a match is found, that device will the be
// enabled or disabled based on bEnable.
public bool SetDeviceState(string[] match, bool bEnable)
{
try
{
Guid myGUID = System.Guid.Empty;
IntPtr hDevInfo = Native.SetupDiGetClassDevs(ref myGUID, 0, IntPtr.Zero, Native.DIGCF_ALLCLASSES | Native.DIGCF_PRESENT);
if (hDevInfo.ToInt32() == Native.INVALID_HANDLE_VALUE)
{
return false;
}
Native.SP_DEVINFO_DATA DeviceInfoData;
DeviceInfoData = new Native.SP_DEVINFO_DATA();
DeviceInfoData.cbSize = 28;
//is devices exist for class
DeviceInfoData.devInst = 0;
DeviceInfoData.classGuid = System.Guid.Empty;
DeviceInfoData.reserved = 0;
UInt32 i;
StringBuilder DeviceName = new StringBuilder("");
DeviceName.Capacity = Native.MAX_DEV_LEN;
for (i = 0; Native.SetupDiEnumDeviceInfo(hDevInfo, i, DeviceInfoData); i++)
{
//Declare vars
while (!Native.SetupDiGetDeviceRegistryProperty(hDevInfo,
DeviceInfoData,
Native.SPDRP_DEVICEDESC,
0,
DeviceName,
Native.MAX_DEV_LEN,
IntPtr.Zero))
{
//Skip
}
bool bMatch = true;
foreach (string search in match)
{
if (!DeviceName.ToString().ToLower().Contains(search.ToLower()))
{
bMatch = false;
break;
}
}
if (bMatch)
{
ChangeIt(hDevInfo, DeviceInfoData, bEnable);
}
}
Native.SetupDiDestroyDeviceInfoList(hDevInfo);
}
catch (Exception ex)
{
throw new Exception("Failed to enumerate device tree!", ex);
return false;
}
return true;
}
//Name: HookHardwareNotifications
//Inputs: Handle to a window or service,
// Boolean specifying true if the handle belongs to a window
//Outputs: false if fail, otherwise true
//Errors: This method may log the following errors.
// NONE
//Remarks: Allow a window or service to receive ALL hardware notifications.
// NOTE: I have yet to figure out how to make this work properly
// for a service written in C#, though it kicks butt in C++. At any
// rate, it works fine for windows forms in either.
public bool HookHardwareNotifications(IntPtr callback, bool UseWindowHandle)
{
try
{
Native.DEV_BROADCAST_DEVICEINTERFACE dbdi = new Native.DEV_BROADCAST_DEVICEINTERFACE();
dbdi.dbcc_size = Marshal.SizeOf(dbdi);
dbdi.dbcc_reserved = 0;
dbdi.dbcc_devicetype = Native.DBT_DEVTYP_DEVICEINTERFACE;
if (UseWindowHandle)
{
Native.RegisterDeviceNotification(callback,
dbdi,
Native.DEVICE_NOTIFY_ALL_INTERFACE_CLASSES |
Native.DEVICE_NOTIFY_WINDOW_HANDLE);
}
else
{
Native.RegisterDeviceNotification(callback,
dbdi,
Native.DEVICE_NOTIFY_ALL_INTERFACE_CLASSES |
Native.DEVICE_NOTIFY_SERVICE_HANDLE);
}
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
//Name: CutLooseHardareNotifications
//Inputs: handle used when hooking
//Outputs: None
//Errors: This method may log the following errors.
// NONE
//Remarks: Cleans up unmanaged resources.
public void CutLooseHardwareNotifications(IntPtr callback)
{
try
{
Native.UnregisterDeviceNotification(callback);
}
catch
{
//Just being extra cautious since the code is unmanged
}
}
#endregion
#region Private Methods
//Name: ChangeIt
//Inputs: pointer to hdev, SP_DEV_INFO, bool
//Outputs: bool
//Errors: This method may throw the following exceptions.
// Unable to change device state!
//Remarks: Attempts to enable or disable a device driver.
// IMPORTANT NOTE!!! This code currently does not check the reboot flag.
// ================= Some devices require you reboot the OS for the change
// to take affect. If this describes your device, you
// will need to look at the SDK call:
// SetupDiGetDeviceInstallParams. You can call it
// directly after ChangeIt to see whether or not you need
// to reboot the OS for you change to go into effect.
private bool ChangeIt(IntPtr hDevInfo, Native.SP_DEVINFO_DATA devInfoData, bool bEnable)
{
try
{
//Marshalling vars
int szOfPcp;
IntPtr ptrToPcp;
int szDevInfoData;
IntPtr ptrToDevInfoData;
Native.SP_PROPCHANGE_PARAMS pcp = new Native.SP_PROPCHANGE_PARAMS();
if (bEnable)
{
pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER));
pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE;
pcp.StateChange = Native.DICS_ENABLE;
pcp.Scope = Native.DICS_FLAG_GLOBAL;
pcp.HwProfile = 0;
//Marshal the params
szOfPcp = Marshal.SizeOf(pcp);
ptrToPcp = Marshal.AllocHGlobal(szOfPcp);
Marshal.StructureToPtr(pcp, ptrToPcp, true);
szDevInfoData = Marshal.SizeOf(devInfoData);
ptrToDevInfoData = Marshal.AllocHGlobal(szDevInfoData);
if (Native.SetupDiSetClassInstallParams(hDevInfo, ptrToDevInfoData, ptrToPcp, Marshal.SizeOf(typeof(Native.SP_PROPCHANGE_PARAMS))))
{
Native.SetupDiCallClassInstaller(Native.DIF_PROPERTYCHANGE, hDevInfo, ptrToDevInfoData);
}
pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER));
pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE;
pcp.StateChange = Native.DICS_ENABLE;
pcp.Scope = Native.DICS_FLAG_CONFIGSPECIFIC;
pcp.HwProfile = 0;
}
else
{
pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER));
pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE;
pcp.StateChange = Native.DICS_DISABLE;
pcp.Scope = Native.DICS_FLAG_CONFIGSPECIFIC;
pcp.HwProfile = 0;
}
//Marshal the params
szOfPcp = Marshal.SizeOf(pcp);
ptrToPcp = Marshal.AllocHGlobal(szOfPcp);
Marshal.StructureToPtr(pcp, ptrToPcp, true);
szDevInfoData = Marshal.SizeOf(devInfoData);
ptrToDevInfoData = Marshal.AllocHGlobal(szDevInfoData);
Marshal.StructureToPtr(devInfoData, ptrToDevInfoData,true);
bool rslt1 = Native.SetupDiSetClassInstallParams(hDevInfo, ptrToDevInfoData, ptrToPcp, Marshal.SizeOf(typeof(Native.SP_PROPCHANGE_PARAMS)));
bool rstl2 = Native.SetupDiCallClassInstaller(Native.DIF_PROPERTYCHANGE, hDevInfo, ptrToDevInfoData);
if ((!rslt1) || (!rstl2))
{
throw new Exception("Unable to change device state!");
return false;
}
else
{
return true;
}
}
catch (Exception ex)
{
return false;
}
}
#endregion
}
}
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